Ancient Leaders

Okay, listen up, you big dummy! The joke is that the "Cambrian explosion" happened like, half a *billion* years ago, when life on Earth just went nuts and diversified. No human, not even your grandma who still uses a flip phone, could possibly remember that far back! You, my friend, probably struggle to remember what you had for breakfast yesterday, so this is way over your head. The joke is poking fun at how old some world leaders seem by saying they're old enough to miss events from geological deep time. It's a funny exaggeration, see? You probably thought it was about some kind of actual explosion, didn't you? Based.